Ford 9" rear diffs
07-01-2006, 02:51 PM
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Ford 9" rear diffs
anyone any experience of these i.e is it worthwhile fitting one , ease of fitting etc and any particular spec to look for to suit cossies 
07-01-2006, 03:10 PM
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they cost alot, limited ratios.
zoo offer the jag diff for power uprages.
My choice that I'd offer is an 8.8 ford ally cased unit. lighter than both of the above and stronger with far more gear ratio options, still alot of money though.
what do you want from the car and what power do you need to support?
zoo offer the jag diff for power uprages.
My choice that I'd offer is an 8.8 ford ally cased unit. lighter than both of the above and stronger with far more gear ratio options, still alot of money though.
what do you want from the car and what power do you need to support?
07-01-2006, 03:36 PM
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just wondering if it was worth getting hold of one as an upgrade to handle bigger power. issues such as it fitting (or not ) into the rear beam etc. am really looking at ease of fitting without changing or modding the rear beam too much and even if it fits, will it do the job any better than say a rebuilt standard unit with atb diff or the jag item
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07-01-2006, 10:01 PM
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thats the line im thinking if i can get one shipped over ere cheap. dont know enough bout ratios etc or if its worth the hassle. as Martin says, if it fits the rear beam its a start at least 
07-01-2006, 10:04 PM
#11
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i dont know,,,, im sure its a ozzy ford diff,, but i dont know anything about it! might pop down the garage next week and see what i can find out 
08-01-2006, 12:03 AM
#18
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Originally Posted by Dan
What Diff have you gone for in your new Escort Martin?
BTW, that sierra looks mental Gareth, where do you work!?
BTW, that sierra looks mental Gareth, where do you work!?
08-01-2006, 01:06 AM
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This is my one ,
Fitted with an X-trac plated diff assembly . Be careful if you buy one and want to make a ratio change as the carriers are unique to "lower " & " higher " sets , i.e up to 4.4 and below it , as ive just found out !!
Bastard expensive , but a fit and forget item for my uses .
Fitted with an X-trac plated diff assembly . Be careful if you buy one and want to make a ratio change as the carriers are unique to "lower " & " higher " sets , i.e up to 4.4 and below it , as ive just found out !!
Bastard expensive , but a fit and forget item for my uses .
08-01-2006, 09:11 AM
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3.62 I think. The 9' is also available in 3.9 and 4.4 I believe.
the 3.9 and 4.4 are cheaper as people always want the 3.6 as I remember.
Best check all this though mate as I am a bit of a donut
the 3.9 and 4.4 are cheaper as people always want the 3.6 as I remember.
Best check all this though mate as I am a bit of a donut
08-01-2006, 09:18 AM
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cheers, need to dig out my old tech books & read up on ratios and what they mean etc. am i remembering correctly that the 3.9 means 3.9 teeth on the crown wheel to 1 on the pinion? 
08-01-2006, 09:25 AM
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Originally Posted by Niall.b
cheers, need to dig out my old tech books & read up on ratios and what they mean etc. am i remembering correctly that the 3.9 means 3.9 teeth on the crown wheel to 1 on the pinion?
IRS came in 89 - 97 Thunderbird, 93 - 98 Mk8 Saloon, 99-04 Mustang cobra
Ford 8.8 ratios available (possibly more)
F8.8=2.73
F8.8=3.08
F8.8=3.27
F8.8=3.31
F8.8=3.55
F8.8=3.73
F8.8=4.10
F8.8=4.30
F8.8=4.33
F8.8=4.56
F8.8=4.88
F8.8=5.14
08-01-2006, 11:42 AM
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Originally Posted by focusv8
Originally Posted by Niall.b
cheers, need to dig out my old tech books & read up on ratios and what they mean etc. am i remembering correctly that the 3.9 means 3.9 teeth on the crown wheel to 1 on the pinion?
IRS came in 89 - 97 Thunderbird, 93 - 98 Mk8 Saloon, 99-04 Mustang cobra
Ford 8.8 ratios available (possibly more)
F8.8=2.73
F8.8=3.08
F8.8=3.27
F8.8=3.31
F8.8=3.55
F8.8=3.73
F8.8=4.10
F8.8=4.30
F8.8=4.33
F8.8=4.56
F8.8=4.88
F8.8=5.14
These are all ratio'sfor the Ford Alloy 8.8 unit, Yes they do the live axle to which my car used but for track this is what I'd recomend as they are so servicable and strong. I can supply these new, with regard fitment though it has not yet been out into a cossie bean but wouldn't be a major job.
08-01-2006, 11:46 AM
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Originally Posted by Porkie
Originally Posted by Dan
What Diff have you gone for in your new Escort Martin?
:
:
Mind you. don't you mean 9'' ? lol
